Nonwovens produced from multicomponent fibers
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D04H-001/00
D04H-013/00
D04H-003/00
D04H-005/00
출원번호
US-0199304
(2008-08-27)
등록번호
US-8513147
(2013-08-20)
발명자
/ 주소
Gupta, Rakesh Kumar
Klosiewicz, Daniel William
Mitchell, Melvin Glenn
출원인 / 주소
Eastman Chemical Company
대리인 / 주소
Owen, Polly C.
인용정보
피인용 횟수 :
17인용 특허 :
395
초록▼
A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible po
A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible polymer microfibers is also provided, the process comprising: a) cutting a multicomponent fiber into cut multicomponent fibers; b) contacting a fiber-containing feedstock with water to produce a fiber mix slurry; wherein the fiber-containing feedstock comprises cut multicomponent fibers; c) heating the fiber mix slurry to produce a heated fiber mix slurry; d) optionally, mixing the fiber mix slurry in a shearing zone; e) removing at least a portion of the sulfopolyester from the multicomponent fiber to produce a slurry mixture comprising a sulfopolyester dispersion and water non-dispersible polymer microfibers; and f) separating the water non-dispersible polymer microfibers from the slurry mixture. A process for producing a nonwoven article is also provided.
대표청구항▼
1. A short-cut microfiber-containing mixture comprising: a plurality of water non-dispersible short-cut polymer microfibers having a fineness of 0.5 d/f or less;water; anda sulfopolyester dispersed in said water,wherein said sulfopolyester has a glass transition temperature (Tg) of at least 40° C.,w
1. A short-cut microfiber-containing mixture comprising: a plurality of water non-dispersible short-cut polymer microfibers having a fineness of 0.5 d/f or less;water; anda sulfopolyester dispersed in said water,wherein said sulfopolyester has a glass transition temperature (Tg) of at least 40° C.,wherein said water dispersible sulfopolyester exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, andwherein said sulfopolyester comprises: (i) residues of one or more dicarboxylic acids;(ii) about 4 to about 40 mole %, based on the total repeating units, of residues of at least one sulfomonomer having 2 functional groups and one or more sulfonate groups attached to an aromatic or cycloaliphatic ring wherein the functional groups are hydroxyl, carboxyl, or a combination thereof;(iii) one or more diol residues wherein at least 25 mole %, based on the total diol residues, is a poly(ethylene glycol) having a structure H—(OCH2—CH2)n—OH wherein n is an integer in the range of 2 to about 500; and (iv) 0 to about 25 mole %, based on the total repeating units, of residues of a branching monomer having 3 or more functional groups wherein the functional groups are hydroxyl, carboxyl, or a combination thereof. 2. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers have a fineness of 0.1 d/f or less. 3. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers comprise at least one polymer selected from the group consisting of polyolefins, polyesters, polyamides, polylactides, polycaprolactone, polycarbonate, polyurethane, and polyvinyl chloride. 4. A short-cut microfiber-containing mixture according to claim 1 wherein said sulfopolyester has a glass transition temperature (Tg) of at least 50° C., wherein said sulfopolyester exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, wherein said water non-dispersible short-cut polymer microfibers comprise cellulose ester. 5. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers comprise at least one polymer selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), homo- and copolymers of polyethylene, homo- and copolymers of polypropylene, and nylon-6. 6. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers comprise polyethylene terephthalate (PET). 7. A short-cut microfiber-containing mixture according to claim 1 wherein said sulfopolyester exhibits a melt viscosity of less than about 6,000 poise measured at 240° C. at a strain rate of 1 rad/sec. 8. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers have a fineness of 0.1 d/f or less. 9. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers have a length of less than 10 millimeters. 10. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers have a length of less than 6.5 millimeters. 11. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers have a length of less than 3.5 millimeters. 12. A short-cut microfiber-containing mixture according to claim 11 wherein said water non-dispersible short-cut polymer microfibers have a fineness of 0.1 d/f or less. 13. A short-cut microfiber-containing mixture according to claim 12 wherein said water non-dispersible polymer microfibers comprise at least one polymer selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), homo- and copolymers of polyethylene, homo- and copolymers of polypropylene, and nylon-6. 14. A short-cut microfiber-containing mixture according to claim 12 wherein said water non-dispersible polymer microfibers comprise polyethylene terephthalate (PET). 15. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut microfibers are monocomponent microfibers. 16. A short-cut microfiber-containing mixture according to claim 1 wherein said short-cut microfiber-containing mixture is in the form a slurry. 17. A short-cut microfiber-containing mixture according to claim 1 wherein said water non-dispersible short-cut polymer microfibers are not bound to one another. 18. A short-cut microfiber-containing mixture according to claim 1 wherein said short-cut microfiber-containing mixture is not in the form of a non-woven web. 19. A short-cut microfiber-containing mixture according to claim 1 wherein said short-cut microfiber-containing mixture is formed by a process comprising a step of contacting a plurality of short-cut multicomponent fibers with a wash water, wherein each of said short-cut multicomponent fibers comprises a plurality of said water non-dispersible short-cut polymer microfibers bound by at least a portion of said sulfopolyester. 20. A short-cut microfiber-containing mixture according to claim 19 wherein said contacting of said short-cut multicomponent fiber with said wash water disperses said sulfopolyester and releases said water non-dispersible short-cut microfibers. 21. A short-cut microfiber-containing mixture according to claim 20 wherein said water of said short-cut microfiber-containing mixture comprises at least a portion of said wash water. 22. A short-cut microfiber-containing mixture according to claim 1 wherein said short-cut multicomponent fibers have an as spun denier of less than 6 denier per filament. 23. A short-cut microfiber-containing mixture according to claim 22 wherein said water non-dispersible short-cut polymer microfibers have a fineness of 0.1 d/f or less.
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Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Process of making water-dispersible multicomponent fibers from sulfopolyesters.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J.; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J.; Tremaine, Dustin A., Processes to produce short-cut microfibers.
Gupta, Rakesh Kumar; Mitchell, Melvin Glenn; Klosiewicz, Daniel William; Clark, Mark Dwight; Anderson, Chris Delbert; Mitchell, Marvin Lynn; Mitchell, Paula Hines; Wolfe, Amber Layne, Wet-Laid process to produce a bound nonwoven article.
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